﻿<!DOCTYPE html>

<html lang="en" xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta charset="utf-8" />
    <title>网页测试</title>
    <script>
        (function() {
            'use strict';

            if (Number.EPSILON == undefined) {
                Number.EPSILON = Math.pow(2, -52);
            }

            if (Number.isInteger == undefined) {
                Number.isInteger = function (value) {
                    return typeof value === 'number' && isFinite(value) && Math.floor(value) === value;
                }
            }

        }) ();

    </script>
</head>
<body>

</body>
</html>